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# M1 Particle on a block on a slope Watch

1. Hey. This question is troubling me 7(iii).
http://www.ocr.org.uk/Images/175268-...echanics-1.pdf

please could someone explain to me what the first step that i have to do is, i dont see how to find the force that is pulling the block up the slope, is is just the friction between the particle and the block?
2. (Original post by SamuelN98)
Hey. This question is troubling me 7(iii).
http://www.ocr.org.uk/Images/175268-...echanics-1.pdf

please could someone explain to me what the first step that i have to do is, i dont see how to find the force that is pulling the block up the slope, is is just the friction between the particle and the block?
The question says that B is in equilibrium as P moves on its upper surface.

So only P and Q are moving.
3. (Original post by notnek)
The question says that B is in equilibrium as P moves on its upper surface.

So only P and Q are moving.
But wont the friction of particle P effectively act on B?
4. (Original post by SamuelN98)
But wont the friction of particle P effectively act on B?
Yes but the weight of the particle (component acting down the slope) is keeping the block in equilibrium.

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